Well working out the 308 & 309, the 309 dropping High Farm would save 2 minutes in each direction. So would create an 8/12 split between the 308 & 309 between NT Hospital & Blyth although still some even headway. Then for the time saved not serving High Farm, could then re-time the 308 & 309

308 / 309
Blyth: 09:51 / 10:03
Whitley Bay Cemetery: 10:07 / 10:19
Whiltley Bay Centre: 10:19 / 10:31 (+2 mins)
NT Hospital: 10:27 / 10:39 (+1 min)
New York Greenlea (309): 10:44 (+2 mins)
Billy Mill (308): 10:36 (+2 mins)
Newcastle: 11:03 / 11:18

308 would have 5 minutes layover in Blyth and 309 would have 7 minutes.